There's been lots of talk lately about how the price of 3D printers is going down, how the choice of materials for 3D printing is expanding, and how improved accessibility of the technology is widening its use in a host of new industries, from medical applications to becoming an instrumental part of the engineering workflow around early prototyping. Yet even with the flood of new, inexpensive, and more consumer-oriented 3D printers for hobbyists, and office-ready models for small and midsized engineering shops, there is still a sizeable bottleneck standing in the way of mainstream adoption. That is, the software used to create the 3D content. Sure, there are the tried-and-true 3D CAD and NURBS-based modeling tools, but not everyone with the germ of a product idea is a CAD specialist, nor do they want to spend the time learning a complex product. Enter a new genre of low-co...